Summary:
- Physicists have been puzzled by the "neutron lifetime puzzle" - the discrepancy between two different methods of measuring the lifetime of a neutron.
- The new proposed solution suggests that some neutrons may be transforming into a new type of "dark" or "invisible" particle, which would explain the difference in measurements.
- This finding, if confirmed, could have important implications for our understanding of fundamental physics and the nature of the universe.